Furnace



UNITED STATES ABSALOM BAOKUS, Jn,

PATENT OFFICE.

or DETROIT, MICHIGAN.

FURNACE.

SPECIFICATION forming part of Letters Patent No. 365,772, dated July 5,1887.

Application filed March 28, .1887.

To all whom it may concern:

Be it known that I, ABsALoM BACKUS, J12, a citizen of the United States,residing at Detroit, in the county of WVayne and State of Michigan, haveinvented certain new and useful Improvements in Furnaces; and I (lodeclare the following to be a full, clear, and exact description oftheinvention, such as will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, and to the letters and figures of referencemarked thereon, which form a part of this specification.

This invention relatcs'to the construction of a furnace for generatingsteam and like purposes, the object of which is to so constructthefurnace that the products of combustion shall be properly andsufficiently consumed, thereby saving a large portion of fuel which islost as furnaces are now constructed; also avoiding the smoke nuisance,which is the result of improperlyconstructed furnaces, al-

lowing the volatile particles'of combustion to escape in the form ofgases and carbonic acid, smoke, or soot, all of which results frominiproper construction, manner of feeding the fuel, and a lack of properdraft or introduction of air to properly aid combustion.

'These objections are effectually overcome by my present invention,which consists in the organization or construction of parls, ashereinafter fully set forth, and pointed out particularly in the claims.

In the drawings, forming a part of the specification, Figure 1 is afront perspective of a furnace containing my invention, having the ironfront below the boiler broken away. Fig. 2 is a vertical central sectiontaken on dotted line m w of Fig. 1 and looking toward the left, the ironfront not being broken away, as in Fig. 1.

B in the drawings represents the boiler; B, the brick-work; D, thebridge-wall; t, the top of said wall, and f the sloping front to saidwall.

G is a dumpinggrate, which I locate along the incline of the bridgewallat the bottom of the incline. (See Fig. 2.) The rear edge of thedumping-grate is provided with pivot-bearings a, with a depending arm,t,

which has a pivotal connection with the ver- Serial No. 232.657. (Nomodel.)

tical bar 0. The bar 0 has a pivotal connec tion with the anchor-arm a,secured to the bridge-wall.

r is a rod, which I pivotally attach to the joining ends of the arm t ofthe dumping-grate and the bar 0, as shown in Fig. 2.

O is a transverse bar having its ends anchored in the side walls, S S,of the furnace. This bar supports the rear endsof the gratebars Z. Theupper faces of the grate-bars are located on a horizontal plane with theupper face of the dumpingau incline, as shown in Fig. 2, the front endsof the grate-bars being lower than the rear ends.

0 is a cross-bar supporting the front of the grate-bars. lts ends areanchored in the side walls, S S, ofthe furnace, and it is supported atthe center by the central or dividing wall, 0, which extends from thebottom of the ashpit upward, meeting and supporting thejoining sides ofthe arched walls A A, as shown in Fig. 2. The opposite sides of thearched walls areanchored to the side walls of the furnace.

F represents the common iron front of a furnace, having theusualfeed-door, F, and doors N to ash-pit. The supporting-bar O, Ilocate back of the iron front about ten inches. The grate-bars Z projectforward of said bar 0 and meet the inner face of the iron frame F, asshown in Fig. 2. The front end, E, of the central wall stands on avertical line with the front face of the supporting bar 0. (See Fig. 2.)

P represents a pillar or support, which I form of a single layer offire-brick, and locate it in front of the front end, E, of the centralwall, 0. Its upper end supports the arches A A at the front, as shown inFig. 1, and stands flush with the back inner face of the front, as shownin Fig. 2. This construction forms a vertical chamber, H, leading fromthe bottom of the ash-pit to the point of juncture of the arches. Thisis an air-induct for feeding the flames under each arch or to theretorts It R. The inner faces of the side walls, S S, terminate at thefront on a line with the central wall, 0, and I locate in front of suchterminations the single brick pillars orsupports P P, the front faces ofwhich also meet the back face of the iron front F. This constructionforms air inducts or fines H H in the sides of the furnace,

grate G, both standing on first shoves the burning products back on theleading from the bottom of the ash-pit m to the under face of the archesA A, and atthe. front ends. These I also employ for admitting commonfeed-doors F, the coal or fuel when placed on the grates should lie backof the bar 0, supporting the grates; or, in other words, that portion ofthe grates projecting forward of said bar should be left clear, so as toallow the air to freely pass up at the front and into the retorts at thefront ends. When the furnace has been charged with fuel the feed-doorsare to be closed. The furnace or retorts It R are supplied freely withair through the open spaces at the front ends of the grate-bars andthrough the air-inducts II 1-1 H. The air passes upward from theash-pit, and the draft may be regulated by the doors N at the ash-pit.To replenish the fuel, the operator grates and charges the retorts, asbefore. The length of the arches A A and the central wall, 0, is abouttwo-thirds the length of the gratebars. The intense or incandescent heatis at the rear ends of the arches under the boiler; and as the upperwalls of the arches are on a horizontal line, locating the rear ends ofthe gratebars higher than the front ends narrows the discharge at therear ends of the rctorts R R and enables me to locate the dumping-gratenearer the boiler, thus making the rear end of the furnace moreshallow,land bringing the flames nearer the shell of the boiler, wherethey belong; and as Igive the front upper face of the bridge-wall theincline f the flames are gradually'and withoutinterruption broughtagainst the shell of the boiler, thereby rapidly generating steam.

Having thus fully set forth my invention, WhatI claim as new, and desireto secure by Letters Patent, is l 1.. In a furnace, the combination ofthe side walls, the central wall, thearchcd walls j oining said centraland side walls, a set of grate-bars located under each arched wall, thefurnacefront having feed-openings above the gratebars, and the centraland side air-fines leading from below the grate-bars into the front endof the retorts, substantially as and for the purposes specified.

2. In aifurnace, and in combination, the side walls, the boiler, thearched walls located horizontally below the boiler, the central wallsupporting said arched walls, its front end terminating some distanceback from the front of the furnace, the inner face of the side wallshaving a like termination, forming the airfiucs leading from the ash-pitto the arched walls A, the set of grate-bars located below each archedwall upon transverse supports, so as to bring the rear ends of thegrate-bars on a higher plane than the forward ends, the furnace-fronthaving feed-doors opening into the retorts, and doors openingiuto theash-pit, as and for the purposes specified.

3. In a furnace, the combination of theboiler, the side walls having theair-flues H H, the

arched walls located horizontally below the boiler, the central wallsupporting said arched walls, its front end terminating some distanceback of the furnace-front, forming the central airflue, the set ofgrate-bars located below each arched wall upon the transverse bars, as

specified, the bridge-wall having the rear-- wardly-inclincd front, thedumping-grate and mechanism for operating said dumping-grate, thefurnace-front,and supportsP P P, meeting the inner face of said front,as and for thepurposcsspecified.

In testimony whereof I affix my signature in presence of two witnesses.

ABSALOM BACKUS, JR.

Witnesses:

It.v B. WHEEL R, B. F. WHEELER.

